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{{distinguish|Copper arsenite}}
{{chembox
{{chembox
| Watchedfields = changed
| verifiedrevid = 399729736
| verifiedrevid = 443420181
| ImageFile = Copper(II)-arsenate-constituent-ions-2D.png
| ImageFile = Copper(II)-arsenate-constituent-ions-2D.png
| ImageSize =
| ImageSize =
| IUPACName = Copper(II) arsenate
| IUPACName = Copper(II) arsenate
| OtherNames = Copper arsenate
| OtherNames = Copper arsenate
| Section1 = {{Chembox Identifiers
|Section1={{Chembox Identifiers
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 24279
| ChemSpiderID = 24279
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| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = RKYSWCFUYJGIQA-UHFFFAOYSA-H
| StdInChIKey = RKYSWCFUYJGIQA-UHFFFAOYSA-H
| CASNo = 7778-41-8
| CASNo = 7778-41-8
| CASNo_Ref = {{cascite|??|??}}
| CASNo_Ref = {{cascite|correct|??}}
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = EV78GZO3YS
| PubChem = 26065
| PubChem = 26065
| RTECS =
| RTECS =
}}
}}
| Section2 = {{Chembox Properties
|Section2={{Chembox Properties
| Formula = Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>
| Formula = Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>
| MolarMass = 468.48 g/mol
| MolarMass = 468.48 g/mol
| Appearance = blue or bluish green powder
| Appearance = blue or bluish green powder
| Density = 5.2 g/cm<sup>3</sup>
| Density = 5.2 g/cm<sup>3</sup>
| MeltingPt = 1100 °C
| MeltingPtC = 1100
| BoilingPt =
| BoilingPt =
| Solubility = insoluble
| Solubility = insoluble
| SolubleOther = soluble in [[ammonia]], dilute [[acid]]s
| SolubleOther = soluble in [[ammonia]], dilute [[acid]]s
| SolubilityProduct = 7.95{{e|&minus;36}}<ref name="crc">{{cite book |author1=John Rumble |title=CRC Handbook of Chemistry and Physics |date=June 18, 2018 |publisher=CRC Press |isbn=978-1138561632 |pages=5–188|edition=99 |language=English}}</ref>
}}
}}
| Section7 = {{Chembox Hazards
|Section7={{Chembox Hazards
| EUIndex = Not listed
| FlashPt =
| FlashPt =
| PEL = TWA 1 mg/m<sup>3</sup> (as Cu)<ref name=PGCH>{{PGCH|0150}}</ref>
| REL = TWA 1 mg/m<sup>3</sup> (as Cu)<ref name=PGCH/>
| IDLH = TWA 100 mg/m<sup>3</sup> (as Cu)<ref name=PGCH/>
}}
}}
| Section8 = {{Chembox Related
|Section8={{Chembox Related
| OtherAnions =
| OtherAnions =
| OtherCations =
| OtherCations =
}}
}}
}}
}}


'''Copper arsenate''' (Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>.4H<sub>2</sub>O, or Cu<sub>5</sub>H<sub>2</sub>(AsO<sub>4</sub>)<sub>4</sub>.2H<sub>2</sub>O), also called '''copper orthoarsenate''' or '''tricopper arsenate''' or '''tricopper orthoarsenate''', is a blue or bluish-green powder insoluble in water and alcohol and soluble in aqueous [[ammonium]] and dilute acids. Its [[CAS number]] is {{CASREF|CAS=7778-41-8}} or {{CASREF|CAS=10103-61-4}}.
'''Copper arsenate''' (Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O, or Cu<sub>5</sub>H<sub>2</sub>(AsO<sub>4</sub>)<sub>4</sub>·2H<sub>2</sub>O), also called '''copper orthoarsenate''', '''tricopper arsenate''', '''cupric arsenate''', or '''tricopper orthoarsenate''', is a blue or bluish-green powder insoluble in water and alcohol and soluble in aqueous [[ammonium]] and dilute acids. Its [[CAS number]] is {{CASREF|CAS=7778-41-8}} or {{CASREF|CAS=10103-61-4}}.


==Uses==
==Uses==
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==Natural occurrences==
==Natural occurrences==
Anhydrous copper arsenate, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>, is found in nature as the mineral '''lammerite'''.<ref>{{ cite journal | first1 = F. C. | last1 = Hawthorne | journal = [[American Mineralogist]] | volume = 71 | year = 1986 | pages = 206–209 | title = Lammerite, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>, a modulated close-packed structure | url = http://www.minsocam.org/ammin/AM71/AM71_206.pdf }}</ref> Copper arsenate tetrahydrate, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>.4H<sub>2</sub>O, occurs naturally as the mineral '''rollandite'''.<ref>{{ cite journal | title = Rollandite, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O, a new mineral | first1 = H. | last1 = Sarp | first2 = R. | last2 = Černý | journal = Eur. J. Mineral. | volume = 12 | year = 2000 | pages = 1045–1050 | doi = 10.1127/0935-1221/2000/0012-1045 }}</ref>
Anhydrous copper arsenate, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>, is found in nature as the mineral '''lammerite'''.<ref>{{ cite journal | first1 = F. C. | last1 = Hawthorne | journal = [[American Mineralogist]] | volume = 71 | year = 1986 | pages = 206–209 | title = Lammerite, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>, a modulated close-packed structure | url = http://www.minsocam.org/ammin/AM71/AM71_206.pdf }}</ref> Copper arsenate tetrahydrate, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O, occurs naturally as the mineral '''rollandite'''.<ref>{{ cite journal | title = Rollandite, Cu<sub>3</sub>(AsO<sub>4</sub>)<sub>2</sub>·4H<sub>2</sub>O, a new mineral | first1 = H. | last1 = Sarp | first2 = R. | last2 = Černý | journal = Eur. J. Mineral. | volume = 12 | year = 2000 | pages = 1045–1050 | doi = 10.1127/0935-1221/2000/0012-1045 | url = https://archive-ouverte.unige.ch/unige:86439 }}</ref>


==Related compounds==
==Related compounds==
'''Copper arsenate hydroxide''' or '''basic copper arsenate''' (Cu(OH)AsO<sub>4</sub>) is a basic variant with CAS number {{CASREF|CAS=16102-92-4}}. It is found naturally as the mineral [[olivenite]]. It is used as an insecticide, fungicide, and [[miticide]]. Its use is banned in Thailand since 2001.[http://www.ipmthailand.org/en/Pesticides/pesticides_banned_abc.htm]
'''Copper arsenate hydroxide''' or '''basic copper arsenate''' (Cu(OH)AsO<sub>4</sub>) is a basic variant with CAS number {{CASREF|CAS=16102-92-4}}. It is found naturally as the mineral [[olivenite]]. It is used as an insecticide, fungicide, and [[miticide]]. Its use is banned in Thailand since 2001.<ref>{{cite web |url=http://www.ipmthailand.org/en/Pesticides/pesticides_banned_abc.htm |title=Banned pesticides (Sorted by common name) |access-date=2006-01-14 |url-status=dead |archive-url=https://web.archive.org/web/20051122181117/http://www.ipmthailand.org/en/Pesticides/pesticides_banned_abc.htm |archive-date=2005-11-22 }}</ref>


==See also==
==See also==
* [[Lead arsenate]]
*[[Calcium arsenate]]
* [[Calcium arsenate]]
*[[Chromated copper arsenate]]
⚫
*[[Lead arsenate]]
* [[Paris Green]] (copper arsenate-acetate)
*[[Paris Green]] (copper acetoarsenite)
⚫
* [[Chromated copper arsenate]]
* [[Scheele's Green]] (copper arsenite)
*[[Scheele's Green]] (copper arsenite)

⚫
==References==
{{Reflist}}


==External links==
==External links==
{{Commons category|Copper(II) arsenate}}
{{Commons category}}
*[http://www.npi.gov.au/database/substance-info/profiles/27.html National Pollutant Inventory - Copper and compounds fact sheet]
*[https://web.archive.org/web/20080302034606/http://www.npi.gov.au/database/substance-info/profiles/27.html National Pollutant Inventory - Copper and compounds fact sheet]

⚫
==References==
{{reflist}}


{{Copper compounds}}
{{Copper compounds}}
{{insecticides}}
{{Insecticides}}


[[Category:Arsenates]]
[[Category:Arsenates]]
[[Category:Copper compounds]]
[[Category:Copper(II) compounds]]
[[Category:Inorganic insecticides]]
[[Category:Inorganic insecticides]]
[[Category:Arsenical herbicides]]
[[Category:Arsenical herbicides]]
[[Category:Rodenticides]]
[[Category:Rodenticides]]
[[Category:Fungicides]]
[[Category:Fungicides]]

[[nl:Koper(II)arsenaat]]
[[zh:砷酸銅]]
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